﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Practices.EnterpriseLibrary.Common.Configuration;
using Microsoft.Practices.EnterpriseLibrary.Common.Configuration.Design.Validation;
using System.Collections.Specialized;
using System.Configuration;
using Microsoft.Practices.EnterpriseLibrary.Common.Configuration.ContainerModel;

namespace Artech.EnterLibExt.ExceptionHandling.Configuration
{
    public class CustomExceptionHandlerFilterData
        : ExceptionFilterData, IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>
    {
        private readonly CustomProviderDataHelper<CustomExceptionHandlerFilterData> helper;

        /// <summary>
        /// Initializes with default values.
        /// </summary>
        public CustomExceptionHandlerFilterData()
        {
            helper = new CustomProviderDataHelper<CustomExceptionHandlerFilterData>(this);
        }

        /// <summary>
        /// Initializes with name and provider type.
        /// </summary>
        public CustomExceptionHandlerFilterData(string name, Type type)
        {
            helper = new CustomProviderDataHelper<CustomExceptionHandlerFilterData>(this);
            Name = name;
            Type = type;
        }

        /// <summary>
        /// Initializes with name and provider type.
        /// </summary>
        public CustomExceptionHandlerFilterData(string name, string typeName)
        {
            helper = new CustomProviderDataHelper<CustomExceptionHandlerFilterData>(this);
            Name = name;
            TypeName = typeName;
        }

        /// <summary>
        /// Gets or sets the fully qualified name of the <see cref="Type"/> the element is the configuration for.
        /// </summary>
        /// <value>
        /// the fully qualified name of the <see cref="Type"/> the element is the configuration for.
        /// </value>       
        public override string TypeName
        {
            get
            {
                return base.TypeName;
            }
            set
            {
                base.TypeName = value;
            }
        }

        /// <summary>
        /// Gets the custom configuration attributes.
        /// </summary>
        public NameValueCollection Attributes
        {
            get { return helper.Attributes; }
        }

        /// <summary>
        /// Sets the attribute value for a key.
        /// </summary>
        /// <param name="key">The attribute name.</param>
        /// <param name="value">The attribute value.</param>
        public void SetAttributeValue(string key, string value)
        {
            helper.HandleSetAttributeValue(key, value);
        }

        /// <summary>
        /// Gets a <see cref="ConfigurationPropertyCollection"/> of the properties that are defined for 
        /// this configuration element when implemented in a derived class. 
        /// </summary>
        /// <value>
        /// A <see cref="ConfigurationPropertyCollection"/> of the properties that are defined for this
        /// configuration element when implemented in a derived class. 
        /// </value>
        protected override ConfigurationPropertyCollection Properties
        {
            get { return helper.Properties; }
        }

        /// <summary>
        /// Modifies the <see cref="CustomExceptionHandlerFilterData"/> object to remove all values that should not be saved. 
        /// </summary>
        /// <param name="sourceElement">A <see cref="ConfigurationElement"/> object at the current level containing a merged view of the properties.</param>
        /// <param name="parentElement">A parent <see cref="ConfigurationElement"/> object or <see langword="null"/> if this is the top level.</param>		
        /// <param name="saveMode">One of the <see cref="ConfigurationSaveMode"/> values.</param>
        protected override void Unmerge(ConfigurationElement sourceElement, ConfigurationElement parentElement, ConfigurationSaveMode saveMode)
        {
            helper.HandleUnmerge(sourceElement, parentElement, saveMode);
        }

        /// <summary>
        /// Resets the internal state of the <see cref="CustomExceptionHandlerFilterData"/> object, 
        /// including the locks and the properties collection.
        /// </summary>
        /// <param name="parentElement">The parent element.</param>
        protected override void Reset(ConfigurationElement parentElement)
        {
            helper.HandleReset(parentElement);
        }

        /// <summary>
        /// Indicates whether this configuration element has been modified since it was last 
        /// saved or loaded when implemented in a derived class.
        /// </summary>
        /// <returns><see langword="true"/> if the element has been modified; otherwise, <see langword="false"/>. </returns>
        protected override bool IsModified()
        {
            return helper.HandleIsModified();
        }

        /// <summary>
        /// Called when an unknown attribute is encountered while deserializing the <see cref="CustomExceptionHandlerFilterData"/> object.
        /// </summary>
        /// <param name="name">The name of the unrecognized attribute.</param>
        /// <param name="value">The value of the unrecognized attribute.</param>
        /// <returns><see langword="true"/> if the processing of the element should continue; otherwise, <see langword="false"/>.</returns>
        protected override bool OnDeserializeUnrecognizedAttribute(string name, string value)
        {
            return helper.HandleOnDeserializeUnrecognizedAttribute(name, value);
        }

        /// <summary>
        /// Gets the helper.
        /// </summary>
        CustomProviderDataHelper<CustomExceptionHandlerFilterData> IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>.Helper
        {
            get { return helper; }
        }

        /// <summary>Invokes the inherited behavior.</summary>
        object IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>.BaseGetPropertyValue(ConfigurationProperty property)
        {
            return base[property];
        }

        /// <summary>Invokes the inherited behavior.</summary>
        void IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>.BaseSetPropertyValue(ConfigurationProperty property, object value)
        {
            base[property] = value;
        }

        /// <summary>Invokes the inherited behavior.</summary>
        void IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>.BaseUnmerge(ConfigurationElement sourceElement,
                    ConfigurationElement parentElement,
                    ConfigurationSaveMode saveMode)
        {
            base.Unmerge(sourceElement, parentElement, saveMode);
        }

        /// <summary>Invokes the inherited behavior.</summary>
        void IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>.BaseReset(ConfigurationElement parentElement)
        {
            base.Reset(parentElement);
        }

        /// <summary>Invokes the inherited behavior.</summary>
        bool IHelperAssistedCustomConfigurationData<CustomExceptionHandlerFilterData>.BaseIsModified()
        {
            return base.IsModified();
        }

        /// <summary>
        /// Retrieves the <see cref="TypeRegistration"/> container configuration model for custom exception handling data.
        /// </summary>
        /// <param name="namePrefix">The child prefix to use when reference child elements</param>
        /// <returns>The type registration for the custom exception handler</returns>
        public override IEnumerable<TypeRegistration> GetRegistrations(string namePrefix)
        {
            yield return new TypeRegistration(
                RegistrationExpressionBuilder.BuildExpression(this.Type, Attributes),
                typeof(IExceptionFilter))
            {
                Name = BuildName(namePrefix),
                Lifetime = TypeRegistrationLifetime.Transient
            };
        }
    }
}
